2014/04/01 by Hongming Jin, F. M. Liu, Jin, H. +15
Computer Science · Engineering · Physics and Astronomy · #FOS: Physical sciences #Neural Networks and Reservoir Computing #Optics (physics.optics) #Photonic and Optical Devices #Photorefractive and Nonlinear Optics #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.1404.0274
openalex publication_date 2014/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Integrated quantum optics becomes a consequent tendency towards practical quantum information processing. Here, we report the on-chip generation and manipulation of photonic entanglement based on reconfigurable lithium niobate waveguide circuits. By introducing periodically poled structure into the waveguide interferometer, two individual photon-pair sources with controllable phase-shift are produced and cascaded by a quantum interference, resulting in a deterministically separated identical photon pair. The state is characterized by 92.9% visibility Hong-Ou-Mandel interference. Continuous morphing from two-photon separated state to bunched state is further demonstrated by on-chip control of electro-optic phase-shift. The photon flux reaches ~1.4*107 pairs nm-1 mW-1. Our work presents a scenario for on-chip engineering of different photon sources and paves a way to the fully integrated quantum technologies.